Abstract:
A device for purging gas bubbles from a liquid in which a wall is arranged to form a passageway, at least half of the wall being in the form of a hydrophobic porous membrane having a pore size between 0.01 to 30 Mu . The liquid flows parallel to the membrane in a passageway between 0.5 and 10 mm maximum thickness and the gas escapes through the pores. The membrane may be formed into a tube and may act as a connector between two lengths of piping, the gas escaping between the ends of the piping. In another construction the device is in the form of a sachet having an intermediate impermeable wall, the liquid being caused to flow parallel to the sides of the wall of the sachet.
Abstract:
Apparatus and process for the concentration of a liquid containing non-ultrafiltrable elements, e.g. ascitic fluid in which liquid is fed to an ultrafilter having a membrane therein, and the concentrate and ultrafiltrate are withdrawn from the ultrafilter in which a pressure drop is induced in the concentrate by an auxiliary hydraulic resistance causing a pressure drop in concentrate which is proportional to the pressure drop exerted on the ultrafiltrate by the membrane in the inverse ratio to the ratio of the flow rates of the concentrate and of the ultrafiltrate.
Abstract:
A device for purging gas bubbles from a liquid in which a wall is arranged to form a passageway, at least half of the wall being in the form of a hydrophobic porous membrane having a pore size between 0.01 to 30 mu . The liquid flows parallel to the membrane in a passageway between 0.5 and 10 mm maximum thickness and the gas escapes through the pores. The membrane may be formed into a tube and may act as a connector between two lengths of piping, the gas escaping between the ends of the piping. In another construction the device is in the form of a sachet having an intermediate impermeable wall, the liquid being caused to flow parallel to the sides of the wall of the sachet.
Abstract:
A device for purging gas bubbles from a liquid in which a wall is arranged to form a passageway, at least half of the wall being in the form of a hydrophobic porous membrane having a pore size between 0.01 to 30 mu . The liquid flows parallel to the membrane in a passageway between 0.5 and 10 mm maximum thickness and the gas escapes through the pores. The membrane may be formed into a tube and may act as a connector between two lengths of piping, the gas escaping between the ends of the piping. In another construction the device is in the form of a sachet having an intermediate impermeable wall, the liquid being caused to flow parallel to the sides of the wall of the sachet.
Abstract:
1370629 Degassing device with semipermeable membrane RHONE-POULENC SA 24 Sept 1971 [29 Sept 1970] 44727/71 Heading B1M A device for purging gas bubbles from a liquid comprises a wall defining a substantially unobstructed liquid passageway, at least 50% of the wall being in the form of a hydrophobic porous membrane, the pores of which have an apparent diameter of 0.01 to 30Á, the maximum thickness of the passageway, measured perpendicular to the porous membrane, being between 0.5 and 10 mm, the inner surface of the membrane having a critical surface tension of less than 40 dynes/om. at 20C. The terms "apparent diameter" and "critical surface tension" are defined in the Specification. The membrane may be formed from P.T.F.E., P.V.C., polyethylene, polyacrylonitrile which has been waterproofed, or paper formed from polynosic fibres. In Fig. 3, sheets 24 and 26 comprise micro porous P.V.C. of thickness 70Á with an average apparent diameter of 0.1Á reinforced with nylon 66 filament, and sheet 28 is of P.V.C. As liquid with bubbles enters at 32, passes through aperture 30 and then out at 34, gas bubbles in the liquid pass through walls 24 and 26. In the embodiment of Fig. 1 (not shown) the membrane is a tube which forms the passageway.